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Science, 1991
The question as to whether males and females have different kinds of intellectual abilities is addressed. The evidence that there are some differences in cognition and perception between men and women is reviewed. (KR)
Descriptors: Genetics, Heredity, Human Body, Intelligence Differences

Boutin, Pierrette; And Others – Journal of Autism and Developmental Disorders, 1997
A Canadian study compared the rate of cognitive disabilities in 156 relatives of 49 individuals with autism to that found in 55 relatives of 18 individuals with mental retardation. No differences were found; however, female and low IQ individuals were found to have higher family histories of cognitive disabilities. (Author/CR)
Descriptors: Adults, Autism, Cognitive Ability, Family Characteristics

Jensen, Arthur R. – Behavior Genetics, 1975
Evidence on the poorer spatial visualization ability in various Negro populations compared to the White populations and on the direction and magnitude of sex differences in spatial ability relative to other abilities suggests the genetic hypothesis that spatial ability is enhanced by a sex-linked recessive gene and that, since the 20-30 percent…
Descriptors: Biological Influences, Genetics, Heredity, Intelligence Differences

Piven, Joseph; And Others – Journal of Autism and Developmental Disorders, 1991
Platelet serotonin (5HT) levels of 5 autistic subjects (ages 16-37) who had siblings with either autism or pervasive developmental disorder were significantly higher than levels of 23 autistic subjects without affected siblings. Autistic subjects without affected siblings had 5HT levels significantly higher than 10 normal controls. Sex, age, and…
Descriptors: Adults, Age Differences, Autism, Biochemistry

Pennington, Bruce F.; And Others – Journal of Learning Disabilities, 1992
This study of 640 twins with reading disability and 436 controls (mean age 12) examined external validity of the distinction between specific reading retardation and reading backwardness, in 3 domains: genetic etiology, sex ratio and clinical correlates, and neuropsychological profiles. There was no evidence of differential genetic etiology of the…
Descriptors: Age Differences, Definitions, Educational Diagnosis, Elementary Secondary Education
Anastasi, Anne – 1973
Much of our thinking about contemporary social problems reflects tacit presuppositions regarding the operation of heredity and environment in human behavior. These beliefs have important implications for practical decisions. Advances in genetics, psychology, anthropology, and other disciplines have contributed much to a clarification of the…
Descriptors: Behavior Development, Behavior Problems, Biological Influences, Cognitive Development
Ogbu, John U. – 1974
This paper deals with the issue of black-white differences in cognitive skills. Some authorities attribute these differences to differences in the environments of black and white homes. Others state that the differences are due to differences in genes, i.e., heredity. Scholars holding these two opposing views have become more or less entangled in…
Descriptors: Cognitive Development, Cognitive Processes, Educational Problems, Employment Opportunities